Patents titanium dioxide

A patent (122) for the production of pigment-grade titanium dioxide describes preparation of titanium tetrafluoride by the reaction of SiF and ilmenite. 

Modop [Mobil Oil Direct Oxidation Process] A process for removing residual sulfur-containing gases from the tail gas from the Claus process. The catalyst is titanium dioxide pelletized with calcium sulfate. Developed in the 1980s by Rhone-Poulenc, Procatalyse, and Mobil Oil. Three plants were operating in Germany in 1995 and one in the United States. European Patents 60,742 78,690. 

White pigments based on zinc sulfide were first developed and patented in 1850 in France. Although they are still of economic importance, they have continually lost market volume since the early 1950s when titanium dioxide was introduced. Only one modern production installation for zinc sulfide pigments still exists in the mar-... 

Titanium dioxide can also be produced with a primary particle size of 10-30 nm, and hence shows transparent properties. Microcrystalline titanium dioxide was first mentioned in Japanese patents in 1978. 

Patent WO 97/10185 Titanium dioxide-based photocatalytic coating substrate and titanium dioxide-based organic dispersions Patent WO 97/10186 Photocatalytic coating substrate. 

Figure 2 Estimated number of patents on titanium dioxide photocatalysis per year, categorized according to water treatment (empty triangles), air treatment (filled diamonds), self-cleaning surfaces (empty circles).

Dainippon (1994). 5-type and anthrone blue pigment—is a mixture containing titanium dioxide and is useful as car paint having good weatherability, crystal stability and dispersibility. Patent WO 9605255-Al. [262t]... 

Meng. X.G. et al.. Methods of preparing a surface-activated titanium dioxide product and of using same in water treatment processes, U.S. Patent 6 919 029, 2005, cited in [2110]. 

Equally unnoticed, 2 years later in 1933, was the granting of U.S. Patent 1 931 381 to the same P. Kubelka (assigned to the Krebs Pigment Color Corp.) for the production of pure titanium dioxide... 

When zirconium silicate (ZrSi04) or a mixture of Z1O3 and SiOj is reacted with aluminum in the presence of aluminum oxide and then rdieated, zirconium silicide (ZrSi ) becomes the major product. Titanium dioxide (TiOs) and boron (111) oxide (BgO,) with aluminum similarly form titanium boride (TiBs). If the reduction of the oxides such as TiOg or Si02 with aluminum is performed in the presence of carbon black, the carbides TiC and SiC are formed embedded in aluminum oxide. This subject is also treated in a British patent titled Autothermic Fired Ceramics. ... 

JP Besson, PWB King, TA Wilkins, MC Mclvor, NJ Everall. Calcination of titanium dioxide. European Patent Appl EP 0767222A2 (1996). 

Within the last several years, a number of companies have investigated the application of Raman spectroscopy to process analysis. A review of the scholarly and patent literature reveals several examples PCI3 reactions, titanium dioxide production, diamondlike carbon (DLC) films production, polymeric fiber property detection, applications to gasoline, aromatic production, chlorosilane production, and gas-phase measurements. In Section in, some of these applications will be reviewed in order to illustrate the application of Raman spectroscopy to process chemistry and control. 

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